﻿/*
 * Copyright (c) 2015-2016 Constantijn Evenhuis (blueprints@const.nl)
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
namespace Blueprints.Editing
{
    /// <summary>
    /// Contains extensions for the EditNode class.
    /// </summary>
    public static class EditNodeExtensions
    {
        /// <summary>
        /// Gets the parent node of <paramref name="node"/>.
        /// </summary>
        /// <param name="node">The node for which to find the parent node.</param>
        /// <returns>The parent node of <paramref name="node"/>, or null if the node has no parent node.</returns>
        public static EditNode GetParentNode(this EditNode node)
        {
            NodeCollection collection = node.EditContext.Nodes;
            int index = collection.IndexOfParentNode(node);
            if (index < 0)
            {
                return null;
            }

            return collection[index];
        }
    }
}